Messages in this thread | | | Date | Thu, 14 Jun 2012 15:43:57 +0800 | Subject | Re: [PATCH v4 02/13] libata: bind the Linux device tree to the ACPI device tree | From | Lin Ming <> |
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On Wed, Jun 13, 2012 at 7:00 PM, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: > On Wed, 13 Jun 2012 16:03:23 +0800 > Lin Ming <ming.m.lin@intel.com> wrote: > >> On Mon, May 28, 2012 at 5:51 PM, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: >> >> +static int is_pci_ata(struct device *dev) >> >> +{ >> >> + struct pci_dev *pdev; >> >> + >> >> + if (!is_pci_dev(dev)) >> >> + return 0; >> >> + >> >> + pdev = to_pci_dev(dev); >> >> + >> >> + if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA && >> >> + (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE) >> >> + return 0; >> > >> > This needs a better name. It doesn't check if a device is PCI ATA or >> > anything of the sort, it checks if its probably a device in compatibility >> > mode. A lot of controllers will in fact report RAID class or similar in >> > native mode. >> >> How about compat_pci_ata? > > Sounds reasonable. I'm not btw sure the test is entirely right, but I'm > not sure quite what you are trying to figure out from it and how ACPI > expects this mapping to work.
It's used to figure out if the dev passed in from scsi layer is a ata device.
scsi_sysfs_add_sdev device_add acpi_platform_notify ata_acpi_find_device is_pci_ata
Thanks, Lin Ming
> > Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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